No tongue moss in Chinese medicine belongs to the mirror tongue, also known as smooth tongue, tongue deep red without moss and bright as a mirror, the main stomach gas, stomach yin dry; tongue color white as a mirror, no blood, also known as white tongue, the main camp blood loss, yang will be out of the disease are critical and difficult to treat.
Chinese medicine believes that the presence or absence of tongue moss can reflect the survival of stomach qi and yin, and can also reflect the prevalence of evil qi, which can be used to determine the prognosis of the disease.
In TCM diagnostics, it is mentioned that reddish mirror tongue is caused by depletion of gastric yin, which is the precursor of yin deficiency disease. A mirror-like tongue with a smooth surface or even without blood color may be due to a serious deficiency of qi and blood, caused by a major deficiency of Ying and blood and a weakening of yang qi.
The absence of tongue coating may be due to serious deficiency of Yin, Qi and Blood, requiring prompt medical attention to avoid delaying the condition.